Mold.



No. 833,701. PATENTED OCT. 16, 1906. J. STRAIT, J. BRAHM & B. E. STRAIT.

MOLD.

APPLICATION FILED 0013.13, 1905. RENEWED SEPT. 1, 1906.

s SHEETS-SHEET 1.

duh UV I Vi messes PATENTED OCT. 16, 1906.

J. STRAIT, J. BRAHM & E. E. STRA'IT.

MOLD.

APPLICATION FILED 0GT.13, 1905. BENI1WED SEPT. 1, 1906.

3 SHEETSSHEET 2.

No. 833,701. PATENTED OCT. 16, 1906. J. STRAIT, J. BRAHM & E. B. STRAIT. MOLD.

APPLIGATION FILED 0UT.13, 1905. RENEWED SEPT. 1, 1906.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

JOHN STRAIT, JAKOB BRAHM, A'ND ELMER E. STRAIT, OF ROCK RAPIDS, IOWA; SAID JOHN STRAIT ASSIGNOR TO SAID ELMER E. STRAIT AND SAID J AKOB BRAHM.

MOLD.

Specification of Letters Patent.

Patented. Oct. 16,1906.

To all whom it may concern:

' Be it known that we, J OHN STRAIT, JAKOB BRAHM, and ELMER E. STRAIT, citizens of the United States, residing at Rock Rapids, in the county of Lyon and State of Iowa, have invented certain new and useful Improvements in Molds; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to molds for producing building-blocks and the like formed of artificial stone.

The object of the invention is to rovide a mold the walls of which can be rea y o ened outward, so as to free the sides of the lock.

Another object is to provide cores which are so disposed as to produce within the block longitudinally-extending passages communicating with a transversely-extending passage, said transversely-extending passage also communicating with recesses formed 1n opposite faces of the block.

Another object is to so construct the longitudinally and transversel extending cores as to permit them to be co la sed prior to the withdrawal thereof from t e molded block.

With the above and other objects in view the invention consists of a mold com rising a base to which are hinged side wal s. The end walls are hin ed to the ends of one of the side walls, and a ock of peculiar form is connected to the other side wall for the purpose of securing all portions of the mold in closed position. A pallet is adapted to be placed upon the base'and below the side and end walls, and extending through this pallet is a.

colla sible central core from the bottom of whic extend blades which are adapted to form a oove or channel in the bottom of the bloc Another stri extends longitudinally of the center of tlie mold at the top thereof, and to each side of the central core are arranged collapsible longitudinally-extending cores.

The invention also consists of providing peculiar means for holdin the cores against collapsing during the mo ding operation, but which enables said cores to be readily contracted for the purpose of withdrawing them.

The invention also consists of further novel slots are adapte features of construction and combination of parts, which will be hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings we have shown the preferred form of our invention.

In said drawings, Figure 1 is a perspective view of our improved mold. Fig. 2 is a central vertical transverse section therethrough. Fig. 3 is a central vertical longitudinal section therethrough. Fig. 4 is a perspective view showing the mold open. tail view ofone of the longitudinal cores. Fig. 6 is a perspective view of the wedge used with said core. Fi 7 is a transverse section through the centra core. Fig. 8 is a detail view of its holding device, and Fig. 9 is a perspective view of the pallet.

Referring to the figures by numerals of reference, 1 is a base to opposite sides of which are secured hinges 2. Two of these hinges are connected to one of the side walls 3 of the mold, while the other hinges are connected to the other side wall 4. End walls 5 and 6 are hinged to the ends of wall 3 and have vertical extensions 7 on their inner faces adjacent the Fig. 5 1s a decenter thereof, at opposite sides of which are formed elongated slots 8. The upper edges of the end walls and the adjoining walls of extensions 7 are recessed or slotted, as shown at 9.

A pallet 10, in the form of a board havin end cleats 1 1 depending therefrom, is adapts to be placed on the base 1 and has a longitudinally-extending slot 12, at the center of which is an enlarged openin 13. This pallet is adapted to be placed on t e base and to be overlapped by the walls of the mold when the mold is closed. The slot 12 receives blade-sections 14, which are located upon the base 1 and extend longitudinally thereof. The opening 13 receives my improved collapsible central core. This core consists of oppositely-disposed similar sections 15 and,

16, the outer surfaces conforming in contour with'the passage which it is deslred to'produce within the molded block. The sections have their adjoining faces channeled longitudinally, as shown at 17, and bothsections extend at their lower ends between the bladesections 14 and have recesses 18 at their upper ends which re 'ster to form slots. These to receive a strip 19,

- within the mold and suitably tam'ped. After "thereof and secured b which extends longitudinally of the mold and is 'detachably seated within the recesses 9 inthe end walls thereof. The sections land 16 are capable of moving laterally in relation to each other, and interposed between them is an S-shaped cam 20, having a stem 21, which is adapted to extend through the strip '19 and is rotatable therein. By rotating this cam the sections and 16 can be pressed apart, and by returning it to its normal position said sections can be pressed to ether. Both sections are preferably covere with -sheetmetal, so that overlapping flanges 22 can be-formed at their adjoining edges.

Located longitudinally within the mold, with their ends seated in the openings 8, are flat tubular cores 23, which are slit longitudinally and preferably formed of sheet metal. Each of these cores is adapted to receive a wedge 24, which when pressed thereinto will expand it and when withdrawn will permit it to collapse. Each wedge has a handle 25 for facilitating its manipulation, and a flange 26 is formed at one edge of each core 23 for limiting its longitudinal 'movement when the wedge 24'is inserted thereinto.

The wall 4 of the mold hasoppositely-extending locking-strips 27 and 28 pivoted thereto, and each of these strips engages an car 29, extending from the end walls of the mold. Lugs 30 are-formed on the strips, so as to hold the end walls against the side wall 4; and oppositely-disposed spring-strips 31 are secured to the strip 27 and adapted to overlap the adjoinin end strip 28, so that both of the strips wil swing in unison when either is raised or lowered.

' In using the mold herein described the pallet 10 is placed upon the base and the walls are then placed in position over the edges means of strips 27 and 28 The expan 'ng-cam 20 is then placed in the central core, and its'stem 21 is placed within the strip 19, which in turn is inserted in the recesses 9 and slots 18. Cores 23 are then placed within openings 8 and their wedges inserted. Said cores 23, as well as the central core, are then expanded by the devices therein, after which the cement of which the block is to be formed is placed this operation has been completed the strip 19 is removed and wed es 24 are withdrawn.- The cores 23 will there ore collapse to a certain extent and canbe readily withdrawn without injuring the adjoining portions of the block. The end walls are then released from strips 27 and 28, after which all of the 'wallsof the mold are swungaway from the block; Cam 20 is then rotated, so as to per- 'rnit'the contraction of the central core, and the pallet 10'is subsequently raised and will lift the block ofi of the central core and the blade-sections 14.

- By providing amold such as herein described a block can be quickly formed of artificial stone and after being so formed can be removed from the mold without being in any wise injured by the cores or other portions of the-molding device.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. A core for molds consisting of oppo sitelydisposed detached sections, sheetmetal coverings therefor terminating in fianges'adapted to overlap, and means interposed between the sections for spreading them apart.

2. A core for. molds-consisting of oppositely disposed detached sections, sheetmetal coverings therefor terminating in flanges adapted to overlap, and rotatable means interposed between but detached from the sections for spreading the core.

3. A mold for producing blocks having communicating longitudinal and transverse passages therein, saidmold comprising a base and walls hinged thereto, a central collapsible core extending from the base, alin ing wings extending from opposite faces-of the core and upon the base, a strip removably mounted upon the core and parallel with the wings, extensions upon opposite walls of the mold contacting with the wings and strip, and a. core removably 'mounted' Within opposite walls and normally contacting with the first-mentioned core.

4. The combination with a mold comprising a base,- side Walls hinged thereto and end walls hinged to-one of the sidewalls; ofa sectional core extending from the base, expanding means interposed between the sections of the core, split tubular cores disposed within the mold,-expanding devices movably mounted therein, a detachable strip extending between the sections of-the central core, and winged sections upon the base and extending from the central core.

' 5. The combination with a mold comprising a base, sidewalls hinged thereto and end walls hinged to one of the side walls; of

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blade-sections upon the base, a sectional central core between the blade-sections and extending from the base, a rotatable expanding device interposed between the sections of the *core, split tubular cores detachably mounted within the end walls, expanding devices within said cores, and a strip extending between the sections of the central core and detachably mounted within the end walls.

. 6. The combination with a mold comprising a base, side walls hinged thereto, end

walls hinged to one of the side walls, and

means forlocking the end walls and side walls together; ofblade-sections upon the base, a sectional core extending from the base and between-the blade-sections, aslotted pallet upon the base and surrounding the bladenames to this specification in the presence of sections of the sectional core, said pallet two subscribing Witnesses.

adapted to be overlapped by the walls of the JOHN STRAIT. mold, expansible cores extending within the JAKOB BRAHM. mold and detachably mounted within oppo- ELMER E. STRAIT. site walls, and expanding devices within all Witnesses:

of the cores. 0. J. MILLER,

In testimony whereof we have signed our MABEL NORTON. 

